Researchers at the University of Gothenburg have made light-powered gears on a micrometer scale. This paves the way for the smallest on-chip motors in history, which can fit inside a strand of hair.

This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Ben Cohen: Microchips are used everywhere, in cars, gaming consoles, medical ...

SAN ANTONIO – We’ve all put change in a vending machine, but the items you can buy through these kiosks can make a real change to some local nonprofit organizations. The Light the World Giving Machine ...